Antarctic Archives - Disasters News

After decades of puzzlement, scientists have finally unlocked the secrets behind the formation of a massive hole in the Antarctic sea ice known as a polynya. This enigmatic phenomenon, which appears intermittently near the submerged peak Maud Rise in the Weddell Sea, has long eluded explanation since its first observation in 1974. Now, a comprehensive study utilizing advanced satellite imagery, autonomous instruments, and computational modeling has shed light on the intricate mechanisms driving the formation and persistence of these vast openings in the ice. Polynyas, holes in the sea ice, are a common sight near the Antarctic shoreline, serving as crucial access points for marine mammals such as seals and whales. However, the Maud Rise polynya, situated farther from the coast, has rema...

In a fascinating revelation, researchers studying the Ross Ice Shelf in Antarctica have uncovered a phenomenon where elastic waves cause the entire sheet to lurch forward once or twice a day. This unexpected discovery sheds light on the dynamic nature of ice shelves and their response to changing environmental conditions. The Ross Ice Shelf, the largest in Antarctica and roughly the size of France, experiences these significant movements triggered by the Whillans Ice Stream, a fast-flowing belt of ice in the West Antarctic Ice Sheet. Geophysicist Doug Wiens from Washington University in St. Louis explains that the entire shelf suddenly moves about 6 to 8 centimeters (2.4 to 3.1 inches) due to a slip on the ice stream that flows into it. These slip events, akin to movements along faul...

Tag: Antarctic

Scientists Unravel Mystery of Antarctic Polynya Formation in Ice

Antarctic Ice Shelf Reveals Daily Movement Triggered by Elastic Waves from Whillans Ice Stream